Every time a new SIM card, either prepaid or postpaid, is issued, the PIN and PUK codes ... iPhone. As previously mentioned, three incorrect PIN attempts will lock your SIM, requiring a PUK to ...

A PUK code is required if a GSM SIM card was locked after entering the wrong PIN code three times in a row. Entering a wrong PUK code ten times in a row disables the SIM card permanently.